Incremented to represent the status of a Zuul executor’s merger
operations. <result> can be either SUCCESS or FAILURE.
A failed merge operation which would be accounted for as a FAILURE
is what ends up being returned by Zuul as a MERGER_FAILURE.

A counter for each type of result.
These results do not, by themselves, determine the status of a build
but are indicators of the exit status provided by Ansible for the
execution of a particular phase.

As an example, given a job named myjob in mytenant triggered by a
change to myproject on the master branch in the gate pipeline
which took 40 seconds to build, the Zuul scheduler will emit the
following statsd events: